Train 18 - तेरी प्यारी प्यारी Livery को किसी की नज़र न लगे

Hi
Please clear my following doubts:-
1.) Plz tell the platform number for Jammu Rajdhani Express/12425 at New Delhi.
Station.
2.) And from where we shall reach the station from Ajmeri Gate or Paharganj....
more...

I have seen some posts relating to this topic, but the answers are confusing.
Different answers have been given viz Platform No. 1 / 14/ 15.
Please anyone who has the correct reliable information, please tell a.s.a.p.
3.) Is there any official railway website from where we can know the platform number of trains, please provide this also.
4.) And how is the quality of food in this train12425 ( boarding at New Delhi)
We have 3 Tier AC ticket
Shall we bring home-made food.
5.) Also provide the platform number for Jammu Rajdhani Express/12426 at Jammu Tawi Station ( Jammu)
6.) And again how is the food quality in this train 12426 ( boarding at Jammu )
Shall we purchase it from outside before boarding the train at Jammu.
We have 3 Tier AC Ticket.
7.) And our train at New Delhi is scheduled to depart at 20:40, when will the chart be available on internet.
Hope anyone clear my doubts
Waiting for the reply
Thanx in advance.
-Kamal